D-Link DFL-260 Product Manual - Page 516
Connection Timeout Settings
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13.5. Connection Timeout Settings Chapter 13. Advanced Settings 13.5. Connection Timeout Settings The settings in this section specify how long a connection can remain idle, that is to say with no data being sent through it, before it is automatically closed. Please note that each connection has two timeout values: one for each direction. A connection is closed if either of the two values reaches 0. TCP SYN Idle Lifetime Specifies in seconds how long a TCP connection, that is not yet fully established, is allowed to idle before being closed. Default: 60 TCP Idle Lifetime Specifies in seconds how long a fully established TCP connection may idle before being closed. Connections become fully established once packets with their SYN flags off have travelled in both directions. Default: 262144 TCP FIN Idle Lifetime Specifies in seconds how long a TCP connection about to close may idle before finally being closed. Connections reach this state when a packet with its FIN flag on has passed in any direction. Default: 80 UDP Idle Lifetime Specifies in seconds how long UDP connections may idle before being closed. This timeout value is usually low, as UDP has no way of signalling when the connection is about to close. Default: 130 UDP Bidirectional Keep-alive This allows both sides to keep a UDP connection alive. The default is for NetDefendOS to mark a connection as alive (not idle) every time data is sent from the side that opened the connection. Connections that do not receive any data from the opening side within the UDP lifetime will therefore be closed even if the other side continues to transmit data. Default: Disabled Ping Idle Lifetime Specifies in seconds how long a Ping (ICMP ECHO) connection can remain idle before it is closed. Default: 8 IGMP Idle Lifetime Connection lifetime for IGMP in seconds. Default: 12 516